Poly(p-phenylenevinylene)s derivatives containing a new electron-withdrawing CF3F4phenyl group for LEDs

Youngeup Jin, Hee Kang Jeung, Suhee Song, Heum Park Sung, Jihyun Moon, Han Young Woo, Kwanghee Lee, Hongsuk Suh

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

New PPV derivatives which contain electron-withdrawing CF3F 4phenyl group, poly[2-(2-ethylhexyloxy)-5-(2,3,5,6-tetrafluoro-4- trifluoromethylphenyl)-1,4-phenylenevinylene] (CF3F 4P-PPV), and poly[2-(4-(2-etylhexyloxy)-phenyl)-5-(2,3,5,6- tetrafluoro-4-trifluoromethylphenyl)-1,4-phenylenevinylene] (P-CF 3F4P-PPV), have been synthesized by GILCH polymerization. As the result of the introduction of the electron-withdrawing CF 3F4phenyl group to the phenyl backbone, the LUMO and HOMO energy levels of CF3F4P-PPV (3.14, 5.50 eV) and P-CF 3F4P-PPV (3.07, 5.60 eV) were reduced. The PL emission spectra in solid thin film are more red-shifted over 50 nm and increased fwhm (full width at half maximum) than solution conditions by raising aggregation among polymer backbone due to electron withdrawing effect of 2,3,5,6-tetrafluoro-4-trifluoromethylphenyl group. The EL emission maxima of CF3F4P-PPV and P-CF3F4P-PPV appear at around 530-543 nm. The current density-voltage-luminescence (J-V-L) characteristics of ITO/PEDOT/polymer/Al devices of CF3F 4P-PPV and P-CF3F4P-PPV show that turn-on voltages are around 12.5 and 7.0 V, and the maximum brightness are about 82 and 598 cd/m2, respectively. The maximum EL efficiency of P-CF 3F4P-PPV (0.51 cd/A) was higher than that of CF 3F4P-PPV (0.025 cd/A).

Original languageEnglish
Pages (from-to)139-147
Number of pages9
JournalBulletin of the Korean Chemical Society
Volume29
Issue number1
DOIs
Publication statusPublished - 2008 Jan 20
Externally publishedYes

Fingerprint

Light emitting diodes
Derivatives
Electrons
Polymers
Electric potential
Full width at half maximum
Electron energy levels
Luminescence
Luminance
Current density
Agglomeration
Polymerization
Thin films
poly(4-phenylenevinylene)

Keywords

  • Electroluminescence
  • Electron-withdrawing group
  • Polymer light emitting diodes (PLEDs)
  • PPV

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

Poly(p-phenylenevinylene)s derivatives containing a new electron-withdrawing CF3F4phenyl group for LEDs. / Jin, Youngeup; Jeung, Hee Kang; Song, Suhee; Sung, Heum Park; Moon, Jihyun; Woo, Han Young; Lee, Kwanghee; Suh, Hongsuk.

In: Bulletin of the Korean Chemical Society, Vol. 29, No. 1, 20.01.2008, p. 139-147.

Research output: Contribution to journalArticle

Jin, Youngeup ; Jeung, Hee Kang ; Song, Suhee ; Sung, Heum Park ; Moon, Jihyun ; Woo, Han Young ; Lee, Kwanghee ; Suh, Hongsuk. / Poly(p-phenylenevinylene)s derivatives containing a new electron-withdrawing CF3F4phenyl group for LEDs. In: Bulletin of the Korean Chemical Society. 2008 ; Vol. 29, No. 1. pp. 139-147.
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abstract = "New PPV derivatives which contain electron-withdrawing CF3F 4phenyl group, poly[2-(2-ethylhexyloxy)-5-(2,3,5,6-tetrafluoro-4- trifluoromethylphenyl)-1,4-phenylenevinylene] (CF3F 4P-PPV), and poly[2-(4-(2-etylhexyloxy)-phenyl)-5-(2,3,5,6- tetrafluoro-4-trifluoromethylphenyl)-1,4-phenylenevinylene] (P-CF 3F4P-PPV), have been synthesized by GILCH polymerization. As the result of the introduction of the electron-withdrawing CF 3F4phenyl group to the phenyl backbone, the LUMO and HOMO energy levels of CF3F4P-PPV (3.14, 5.50 eV) and P-CF 3F4P-PPV (3.07, 5.60 eV) were reduced. The PL emission spectra in solid thin film are more red-shifted over 50 nm and increased fwhm (full width at half maximum) than solution conditions by raising aggregation among polymer backbone due to electron withdrawing effect of 2,3,5,6-tetrafluoro-4-trifluoromethylphenyl group. The EL emission maxima of CF3F4P-PPV and P-CF3F4P-PPV appear at around 530-543 nm. The current density-voltage-luminescence (J-V-L) characteristics of ITO/PEDOT/polymer/Al devices of CF3F 4P-PPV and P-CF3F4P-PPV show that turn-on voltages are around 12.5 and 7.0 V, and the maximum brightness are about 82 and 598 cd/m2, respectively. The maximum EL efficiency of P-CF 3F4P-PPV (0.51 cd/A) was higher than that of CF 3F4P-PPV (0.025 cd/A).",
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T1 - Poly(p-phenylenevinylene)s derivatives containing a new electron-withdrawing CF3F4phenyl group for LEDs

AU - Jin, Youngeup

AU - Jeung, Hee Kang

AU - Song, Suhee

AU - Sung, Heum Park

AU - Moon, Jihyun

AU - Woo, Han Young

AU - Lee, Kwanghee

AU - Suh, Hongsuk

PY - 2008/1/20

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N2 - New PPV derivatives which contain electron-withdrawing CF3F 4phenyl group, poly[2-(2-ethylhexyloxy)-5-(2,3,5,6-tetrafluoro-4- trifluoromethylphenyl)-1,4-phenylenevinylene] (CF3F 4P-PPV), and poly[2-(4-(2-etylhexyloxy)-phenyl)-5-(2,3,5,6- tetrafluoro-4-trifluoromethylphenyl)-1,4-phenylenevinylene] (P-CF 3F4P-PPV), have been synthesized by GILCH polymerization. As the result of the introduction of the electron-withdrawing CF 3F4phenyl group to the phenyl backbone, the LUMO and HOMO energy levels of CF3F4P-PPV (3.14, 5.50 eV) and P-CF 3F4P-PPV (3.07, 5.60 eV) were reduced. The PL emission spectra in solid thin film are more red-shifted over 50 nm and increased fwhm (full width at half maximum) than solution conditions by raising aggregation among polymer backbone due to electron withdrawing effect of 2,3,5,6-tetrafluoro-4-trifluoromethylphenyl group. The EL emission maxima of CF3F4P-PPV and P-CF3F4P-PPV appear at around 530-543 nm. The current density-voltage-luminescence (J-V-L) characteristics of ITO/PEDOT/polymer/Al devices of CF3F 4P-PPV and P-CF3F4P-PPV show that turn-on voltages are around 12.5 and 7.0 V, and the maximum brightness are about 82 and 598 cd/m2, respectively. The maximum EL efficiency of P-CF 3F4P-PPV (0.51 cd/A) was higher than that of CF 3F4P-PPV (0.025 cd/A).

AB - New PPV derivatives which contain electron-withdrawing CF3F 4phenyl group, poly[2-(2-ethylhexyloxy)-5-(2,3,5,6-tetrafluoro-4- trifluoromethylphenyl)-1,4-phenylenevinylene] (CF3F 4P-PPV), and poly[2-(4-(2-etylhexyloxy)-phenyl)-5-(2,3,5,6- tetrafluoro-4-trifluoromethylphenyl)-1,4-phenylenevinylene] (P-CF 3F4P-PPV), have been synthesized by GILCH polymerization. As the result of the introduction of the electron-withdrawing CF 3F4phenyl group to the phenyl backbone, the LUMO and HOMO energy levels of CF3F4P-PPV (3.14, 5.50 eV) and P-CF 3F4P-PPV (3.07, 5.60 eV) were reduced. The PL emission spectra in solid thin film are more red-shifted over 50 nm and increased fwhm (full width at half maximum) than solution conditions by raising aggregation among polymer backbone due to electron withdrawing effect of 2,3,5,6-tetrafluoro-4-trifluoromethylphenyl group. The EL emission maxima of CF3F4P-PPV and P-CF3F4P-PPV appear at around 530-543 nm. The current density-voltage-luminescence (J-V-L) characteristics of ITO/PEDOT/polymer/Al devices of CF3F 4P-PPV and P-CF3F4P-PPV show that turn-on voltages are around 12.5 and 7.0 V, and the maximum brightness are about 82 and 598 cd/m2, respectively. The maximum EL efficiency of P-CF 3F4P-PPV (0.51 cd/A) was higher than that of CF 3F4P-PPV (0.025 cd/A).

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KW - Electron-withdrawing group

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KW - PPV

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